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Class-D amps reduce power dissipation

Posted: 31 Jul 2009     Print Version  Bookmark and Share

Keywords:Class-D amplifier  audio  car infotainment 

NXP Semiconductors has released a new family of dual channel Class-D amplifiers that deliver cutting-edge sound quality and energy efficiency. The NXP TDF8599 Class-D amplifier family operates with maximum output power from 70W to 130W and significantly reduces power dissipation in the vehicle head-unit compared to traditional Class-AB amplifiers, and ensures more efficient heat management.

The amplifiers offer extremely high dynamic audio range that transforms the vehicle entertainment experience, delivering concert hall-like sound quality for best-possible audio enjoyment on the move. The TDF8599 amplifier family complements NXP's existing broad portfolio of highly energy-efficient class-D amplifiers.

Christian Seidel, group leader hardware, mechanics and layout audio system engineering group from Harman Becker Automotive Systems in Straubing, Germany said, "TDF8599 series gives us the opportunity to dramatically reduce the power dissipation in our multi-channel audio amplifiers and at the same time increase the sound quality to satisfy our customers' needs."

"As car manufacturers continue to identify new opportunities to improve the passenger experience, and integrate an increasing range of functionality into their latest vehicles, it's critical that in-car energy consumption is effectively and responsibly managed," said Tobias Helbig, senior director audio power in BL car entertainment solutions at NXP. "With our new TDF8599 Class-D stereo amplifier family, we offer an outstanding audio experience while further driving down power consumption. We are creating the ideal technology platform to support next generation in-vehicle infotainment."

The TDF8599 family includes the TDF8599A and TDF8599B dual bridge-tied load car audio amplifiers comprising a dual NDMOS-Transistor output stage based on SOI BCD MOS technology. The TDF8599A can operate in either non-I2C-bus mode or I2C-bus mode. When in I2C-bus mode, DC load detection results and fault conditions can be easily read back to the device. Up to 15 I2C-bus addresses can be selected. All products are fully qualified according to the AEC-Q100 automotive quality standard.

Three devices from the new TDF8599 Class-D stereo amplifier family for car radio applications may be ordered now.

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